David and Luca is your oldest step brother, your mother married an vampire guy so David and luca's father decided to show them their mom and son...

Their father show his wife but where's the son?, the son was shy and hide behind his mother

David and Luca confused to see where's the other one

David said "where's our other step brother?"

Luca spoke also yup where's he?

He's still hiding from his mother

Mother spoke "his hiding behind me hes a shy boy"